Improvement in card-teeth for machine-cards



UNITED STATES PATENT OFFICE.

JOHN L. TUTTLE, OF NEV YORK,h N. Y.

IMPROVEMENT IN eARD-TEETH FoR MACHINE-CARDS.

Specification forming part of Letters Patent No. l 5,905, dated October14, 1856.

To all whom it may concern:

Be it known that I, JOHN L. TUTTLE, of the city, county, and State ofNew York, have invented certain new' and useful Improvey, :ments in thePreparation of Steel Wire to be Used for Card or Cylinder Teeth forWorking or Cleaning Wool or Cotton; and I do hereby declare thefollowing to be a full, clear, and eXact description of lthe same,reference being had to the accompanying drawings, making apart of thisspecification, in Which- Figures l, 2, 3 represent side and back viewsof the wire. Figs. 4, 5, 6 represent cross-sections through the same.Fig. 7 represents a manner of setting the teeth.

The nature of my invention relates to certain improvements in card-teethby the preparation of previously-drawn steel wire to be used in cards,clothing, or cylinders for carding wool or cleaning cotton; and itconsists in so shaping or flattening round steel Wire as that when setin the cards or on cylinders and ground oft to make a surface the sameoperation shall make a point to each tooth, as will be described.

I take round steel wire of suitable size and pass itthrough betweengrooved rollers` of such form as will flatten it out on one side of itscenter to nearly a knife-edge, or so that a section through or acrosssuch rolled or attened wire would resemble in appearance a sectionthrough a razor-blade. It is immaterial as to the exact form of the backof the wire, but important to have its edge portion flattened to aknife-edge, or nearly so. The wire thus formed may be tinned and thenset in akcylinder, as described in the Letters Patent granted to me onthe 30th October, 1849.

There is a marked difference between the drawing of steel WireIthroughdiesand the attening or shaping of such wire, as herein set `forth, bypassing it through between steel or hard rollers after it has been drawnout through the dies. In drawing Wire the ber of the metal follows thedirection of the progressive drawings through ,the dies. I take the wirethus drawn and atten out.one`half of it, or thereabout, bringing it downto a knife-edge, but not a serrated or rough edge, but one perfectlysmooth, the ber being rolled at right angles to its position in thedrawn wire; and to keep the wire from undue spread- 1851, represents atooth of ing or from separation of its ber, I place the --rolls in oil,which prevents any tendency of the bers to part, turn out, or make arough surface. The opposite side of the Wire from a longitudinal linedrawn through its center may remain in the form in which it comes fromthe die; or it may be slightly pressed in toward that part whichisattened out to prevent the ber from separating laterally.

Fig. l represents a side view, and Figs. 2, 8 represent a back view,ofthe attened wire, the lower` portions being represented as unrolled.Figs. 4, 5, and 6 show the form of the wire in cross-section after it isattened, all the gures being drawn on an enlarged scale to betterrepresent the form.

When the attened Wire a c a is set in the cards, it is cut off in anoblique direction, so as to form a point, Z b b, next the knife-edge.After the teeth are set in the cards or cylinder, they are ground off ontheir oblique or inclined ends to surface theun, (as it is termed,) andthis also atthe same time produces the points b, and saves not only thene cessity of file dressing, but makes a better point and at a betterlocation in the tooth for entering the ber. ,A

In resharpening the teeth it is only neces sary to resurface, oneoperation completing the whole until the teeth are entirely worn out.This method of preparing the article leaves no feathered or n edges tocatch, hold, or clog the cards with the ber. Y y

Having thus fully described the nature of my invention and shown how thesame may be used, I would state that y Richd. Kitsomin his patent ofNovember 1l, soft iron and of small wire with a crosssection resemblingthe cross-section of my card-teeth. This I do not claim; but 4 What I doclaim as new, and desire to secure by Letters Patent, is

The making of card teeth by giving to steel wire the form hereindescribed and substantially in the manner set forth, so that when setand a surface ground on them, the same grinding shall form the sharppoints thereon.

J. L. 'TUTTLE Vitnesses: i

A. B. SToUGHToN, E. COHEN.

I am aware that

